Method for preparing onion-shaped internal coating metal nickel carbon particle with deoiling asphalt

Abstract

The invention relates to a method of manufacturing an onion-like nickel carbon particle containing metal by using de-oiled asphalt, which uses the de-oiled asphalt and metal nickel powder as raw materials, the nickel powder as catalyst, hydrochloride, deionized water as cleaning agent and argon as protective gas. Under the protection of the argon, the de-oiled asphalt powder is sintered in a high temperature furnace where temperature is below 1000 DEG C. The de-oiled asphalt powder and the metal nickel powder are sintered for 60 minutes in a vacuum sintering furnace where the temperature of 2000 DEG C is constantly maintained and retained to obtain onion-like nickel carbon particles containing metal. The particles are black and spheroid-shaped, with the diameter of 10 to 30nm. The thickness of carbon layer coating surface of the particle is 5nm. Inner core of the metal nickel is 5 to 20nm. The cross-section of the particle is provided with distinct onion-like cascading coating structure. The carbon layer and the metal nickel particle are uniform, which have high purity and stable physical and chemical properties. The method has short process flow, the rich source of materials and high productivity that can reach 66 per cent.

Description

technical field [0001] The invention relates to a method for preparing onion-shaped metal-coated nickel-carbon particles with deoiled pitch, and belongs to the technical field of research and preparation methods of organic compound carbon materials and their products. Background technique [0002] Organic compound Deoiled Asphalt, referred to as DOA, is a by-product of the residual oil solvent deasphalting process. It is a hard and brittle solid or powder at room temperature. The appearance is black or brown, similar to coal, and the density is 1.1g / cm 3 , no fixed melting point, softening point >120°C, carbon content >80%, low ash content, viscous semi-fluid at high temperature. [0003] Deoiled pitch is often used as raw material for coking and blast furnace fuel. With the development of science and technology, high value-added applications have also emerged. Nanotechnology and nanomaterials are emerging fields of material science in the past decade. Using its carbon...

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Problems solved by technology

[0005] There are also many methods for preparing onion-shaped metal-coated nickel-carbon materials, such as: chemical vapor deposition method, arc discharge method, pyrolysis method, liquid phase impregnation carbonization method, and metal-containing carbon dry-based gel explosion method. A lot of progress, but there are still many technical problems and deficiencies, which need to be studied, such as the particle size distribution of the inner metal, the control of the ratio of the inner metal, the metal crystal form, the thickness of the carbon layer, the degree of crystallization, and the yield of the product. It is a topic that needs to be discussed and studied

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